Elevator



(No Model.)

G. H. STILSON.

ELEVATOR.

No. 392,700. Patented Nov. 13, 1888-.

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N. PEYERS. Phalo-Lilhogmpher. Washington. 0.6.

iiNiTED STATES TENT FFlCEQ CLARENCE H. STILSON, OF NEW HAVEN, CONNECTICUT.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 392,700, dated November 13, 1888.

Application filed July 9, 1888. Serial No. $179,479. (No model.)

To all whom it may concern.-

Be it known that I, CLARENCE H. S'riLsoN, residing at New Haven, in the county of New Haven and State of Connecticut,haveiu vented certain new and useful Improvements in Elevators; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improvement in passenger and freight elevators, the object being to make them easier to operate and safer to use.

' With these ends in view my invention consists in a traveling cable made rigid in one part and adapted to automatically open the landing-door opposite the car and maintain the remaining landing-doors closed; in a rigid stationary operating rail eammed or curved to permit the car-door to be opened only at the landings and to automatically close it, and in certain other details of construction, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view, partly in section and partly in elevation, of an elevator well and car. Fig. 2 isa view in vertical section through one of the landings and the car. Fig. 3 is an enlarged View, partly in section and partly in elevation, on the line errof Fig. 2; and Fig. 4 is a detached view, in elevation, showing the rigid part of the traveling cable and its short rigid companion rail.

As herein shown, the traveling cable A is rigidly secured by a series of hooks, B, to the front of the elevator-car C, upon which they are arranged on a curve reaching its maximum of deflection below the center of the car and from that point curving inward on corresponding lines. Leaving the car at the upper and lower ends thereof, the cable is elsewhere free, but under tension, and passes over a pulley, Ll), supporting and guiding it, and located at the top of the elevator-well E, and over a similar pulley, F, located at the bottom of the said well. A. grooved roller, G, mounted on a spindle, H, extending inward from the inside of each of the landing-doors I, is engaged, as the car is raised and lowered, by the said rigid part of the cable,with the effect of closing the doors, which are held closed by the straight portion of the cable, as shown by dotted lines in Fig. of the drawings, where the door of.

the lower landing is represented as closed. It will thus be seen that these rollers .t'orm means for temporarily coupling the doors with the cable.

The stationary operating-rail J consists ofa rigid steel rail,secured at its upper and lower ends in the top and bottom of the well, passing through openings K and L, formed at the top and bottom of the car, and engaging with a roller, M, mounted on a spindle, N, extending inwardly from the inside of the car-door O, as shown by Fig. 2 of the drawings. This rigid rail J is bent or cammed to include curves which sweep outward, so as to permit the cardoor to be opened at every elevator-landing, and is engaged by the roller M, aforesaid,with the effect of automatically closing the can door when the car leaves any landing and whether it goes up or down. The car-door is provided with an ordinary spring-catch for looking it shut; but this is not shown. herein.

Under my invention,then, the landing-doors are automatically closed by the descent or elevation of the car and held shut by the tension .of the traveling cable, while the ear-door is automatically closed by the rigid guide which also prevents it from being opened except when the car is opposite the landing-doors.

If desired, the opening of the landing-doors may be made automatic by the employment of a rigid companion rail, P, secured to the car and following the line of the rigid part of the traveling cable and located inside of the same, with a sufficient space between them for the grooved roller to travel in.

The apparatus, so far as it is applied to the manipulation of the landing-doors, is applicable to frcight-clevators which employ lifts rather than cars. On the otherhand, the pro vision for confining the opening of the cardoors to the landings makes it possible and safe to leave the well open except for a railing at the landings, whereby the closed shaft, so objectionable in case of fire, is avoided.

It is apparent that in carrying out my in vention it may undergo some changes. I would therefore have it understood that I do not limit myself to what lhaveherein shown,

but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an elevator, the combination, with the landingdoors of a well, of an elevator-car, a traveling cable rigidly attached on a curved line to the car and extending in astraight line above and below the landing-doors, and means, substantially as shown, for temporarily coupling the doors with the cable, substantially as set forth.

2. In an elevator, the combination,with the landing-doors, of an elevator-ear, an endless traveling cable rigidly attached on a curved line to the car and extending in a straight line above and below the landing-doors, supports located above and below the doors for supporting and guiding the cable which in its rigid part automatically closes the landing-doors and in its straight part holds them closed,and means, substantially as shown, for temporarily coupling the doors with the cable,substantially as set forth.

3. In an elevator, the combination, with the oardoor of an elevatorcar, of a rigid station ary operating-rail extending from the top to the bottom of the well and arranged and bent so as to automatically close the car-door and hold it closed except as the car is opposite the elevator-landings, and means, substantially as described, for temporarily coupling the cardoor with the said rail, substantially as set forth.

4. In an elevator, the combination, with the landing-doors, of an elevator-oar, a traveling cable rigidly attached on a curved line to the car and extending in a straight line above and below the landing-doors, and a rigid rail secured to the car and following the line of the rigid part of the traveling cable with sufficient space between them for a projection from the landing-doors to run in, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesscs.

CLARENCE H. STILSON.

Witnesses:

OHAs. B. SHUMWAY, Cans. L. SWAN, Jr. 

